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Questions and Answers
What is the purpose of grading in the determination of particle-size distribution for aggregate?
What is the purpose of grading in the determination of particle-size distribution for aggregate?
- To assess the particle-size distribution for aggregate (correct)
- To control the segregation of aggregate particles
- To specify the amount of cement used
- To determine the water-cement ratio for concrete
Why are grading limits and maximum aggregate size specified for concrete?
Why are grading limits and maximum aggregate size specified for concrete?
- To control the setting time of concrete
- To influence the color of the concrete
- To determine the strength of the concrete
- To impact the amount of aggregate used, workability, and durability of concrete (correct)
What is the purpose of using gap-graded aggregate in concrete?
What is the purpose of using gap-graded aggregate in concrete?
- To reduce the water-cement ratio
- To obtain uniform textures in exposed aggregate concrete (correct)
- To improve the pumpability of the concrete
- To increase the strength of the concrete
Why is close control of mix proportions necessary when gap-graded aggregate is used?
Why is close control of mix proportions necessary when gap-graded aggregate is used?
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Which apparatus is necessary for the determination of particle size distribution of coarse aggregates by sieving or screening?
Which apparatus is necessary for the determination of particle size distribution of coarse aggregates by sieving or screening?
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